Crossword Genius

A role that’s separate (5)

Ross

I believe the answer is:

'separate' is the definition.
(similar in meaning)

'a role' is the wordplay.
'role' becomes 'part' (synonyms).
'a'+'part'='APART'

'that's' is the link.

(Other definitions for apart that I've seen before include "out on a limb?", "away", "First Christmas present from my love", "Asunder", "aloof".)

I've seen this clue in The Times.